Cutters Mill 4-12KT™ • Inch

The Mill 4-12(KT) metric tangential shoulder milling cutters are a fantastic choice for steel and cast-iron roughing and finishing applications. They require up to 15% less horsepower, enabling increased feed rates even on 40 taper machines. With a depth-of-cut range up to .472" (12mm), the Mill 4-12KT can bring new versatility to your shoulder milling applications. The advanced insert/pocket interface ensures stability and consistent performance in difficult applications. Its proprietary designs offer minimal axial runout delivering excellent floor finish. Easy insert indexing through screw clamping.

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    Workpiece Material
    Workpiece Material
    • P Steel (20)
      • P0
        Low-Carbon Steels, Long Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(20)
      • P1
        Low-Carbon Steels, Short Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(20)
      • P2
        Medium and High Carbon Steels C < .25%; <220 HB; <25 HRC; >530 N/mm^2 UTS(20)
      • P3
        Alloy Steels & Tool Steels C > .25%; <330 HB; <35 HRC; 600-850 N/mm^2 UTS(20)
      • P4
        Alloy Steels & Tool Steels C > .25%; 350-420 HB; 35-43 HRC; 850-1400 N/mm^2 UTS(20)
      • P5
        Ferritic, Martensitic, and PH Stainless Steels <330 HB; <35 HRC; 600-900 N/mm^2 UTS(20)
      • P6
        High Strength Ferritic, Martensitic, and PH Stainless Steels 350-450 HB; 35-43 HRC; 900-2400 N/mm^2 UTS(20)
    • M Stainless Steel (20)
      • M1
        Austenitic Stainless Steel 130-200 HB; <600 N/mm^2 UTS(20)
      • M2
        High Strength Austenitic Stainless and Cast Stainless Steels 150-230 HB; <25 HRC; >600 N/mm^2 UTS(20)
      • M3
        Duplex Stainless Steel 135-275 HB; <30 HRC; 500-1200 N/mm^2 UTS(20)
    • K Cast Iron (20)
      • K1
        Gray Cast Iron 120-290 HB; <32 HRC; 125-500 N/mm^2 UTS(20)
      • K2
        Low and Medium Strength CGI and Ductile Irons 130-260 HB; <28 HRC; <600 N/mm^2 UTS(20)
      • K3
        High Strength Ductile and Austempered Ductile Iron 180-350 HB; <43 HRC; >600 N/mm^2 UTS(20)
    • S High-Temp Alloys (20)
      • S1
        Iron-Based, Heat-Resistant Alloys 160-260 HB; 25-48 HRC; 500-1200 N/mm^2 UTS(20)
      • S2
        Cobalt-Based, Heat-Resistant Alloys 250-450 HB; 25-48 HRC; 1000-1450 N/mm^2 UTS(20)
      • S3
        Nickel-Based, Heat Resistant Alloys 160-450 HB; <48 HRC; 600-1700 N/mm^2 UTS(20)
      • S4
        Titanium and Titanium Alloys 300-400 HB; 33-43 HRC; 900-1600 N/mm^2 UTS(20)
    • H Hardened Materials (20)
      • H1
        Hardened Materials 44-48 HRC(20)
    Applications
    Applications
    • Face MillingFace Milling (20)
    • Shoulder MillingShoulder Milling (20)
    • Shoulder RoughingShoulder Roughing (14)
    • Shoulder Square EndShoulder Square End (6)
    Cutting Diameter
    Cutting Diameter
    • 2.0 in(3)
    • 2.5 in(3)
    • 3.0 in(3)
    • 4.0 in(3)
    • 5.0 in(3)
    • 6.0 in(3)
    • 8.0 in(2)
    Cutting Diameter MinaCutting Diameter Max
    Cutting Diameter
    Cutting Diameter
    • 50.801 mm(3)
    • 63.5 mm(3)
    • 76.2 mm(3)
    • 101.601 mm(3)
    • 127.0 mm(3)
    • 152.4 mm(3)
    • 203.201 mm(2)
    Cutting Diameter MinaCutting Diameter Max
    Cutting Length
    Cutting Length
    • 12.125 mm(3)
    • 12.15 mm(17)
    Cutting Length MinaCutting Length Max
    Cutting Length
    Cutting Length
    • 0.478 in(3)
    • 0.479 in(17)
    Cutting Length MinaCutting Length Max
    Reach
    Reach
    • 1.5 in(3)
    • 1.75 in(6)
    • 2.0 in(3)
    • 2.375 in(8)
    Reach MinaReach Max
    Reach
    Reach
    • 38.1 mm(3)
    • 44.45 mm(6)
    • 50.801 mm(3)
    • 60.325 mm(8)
    Reach MinaReach Max
    Connection Style
    Connection Style
    • A-Socket Head Cap Screw (15)
    • B-Cutter Retention Screw (3)
    • C-Bolt Circle (2)
    Number of Flutes
    Number of Flutes
    • 10 (1)
    • 11 (2)
    • 12 (2)
    • 14 (1)
    • 16 (3)
    • 18 (1)
    • 22 (1)
    • 4 (1)
    • 5 (2)
    • 6 (2)
    • 7 (1)
    • 8 (2)
    • 9 (1)
    Internal Coolant Capability
    Internal Coolant Capability
    Over All Length [L]
    Over All Length [L]
    • 1.5 in(3)
    • 1.75 in(6)
    • 2.0 in(3)
    • 2.375 in(8)
    Over All Length [L] MinaOver All Length [L] Max
    Over All Length [L]
    Over All Length [L]
    • 38.1 mm(3)
    • 44.45 mm(6)
    • 50.801 mm(3)
    • 60.325 mm(8)
    Over All Length [L] MinaOver All Length [L] Max
    cornerConfiguration
    Corner Radius
    Corner Radius
    • 0.016 in(20)
    • 0.031 in(20)
    • 0.047 in(20)
    • 0.061 in(20)
    • 0.078 in(20)
    • 0.094 in(20)
    • 0.125 in(20)
    Corner Radius MinaCorner Radius Max
    Corner Radius
    Corner Radius
    • 0.4 mm(20)
    • 0.8 mm(20)
    • 1.201 mm(20)
    • 1.55 mm(20)
    • 1.975 mm(20)
    • 2.375 mm(20)
    • 3.176 mm(20)
    Corner Radius MinaCorner Radius Max
    application
    Grade Of Cutting Tool
    Grade Of Cutting Tool
    • KC522M (20)
    • KC725M (20)
    • KCK15 (20)
    • KCK20 (20)
    • KCK20B (20)
    • KCPK30 (20)
    • KCPM40 (20)
    • KCSM40 (20)
    • X00626 (20)
    Maximum Ramp Angle
    Maximum Ramp Angle
    • 0.008 (2)
    • 0.011 (3)
    • 0.013 (3)
    • 0.016 (3)
    • 0.021 (3)
    • 0.026 (3)
    • 0.041 (3)
    Maximum Ramp Angle MinaMaximum Ramp Angle Max
    frontEnd
    Insert Shape
    Insert Shape
    • L-RECTANGLE 90 (20)
    • L-RECTANGLE ON EDGE 90 (20)
    backEnd
    Back-End Diameter
    Back-End Diameter
    • 19.05 mm(3)
    • 25.401 mm(6)
    • 31.75 mm(3)
    • 38.1 mm(3)
    • 50.801 mm(3)
    • 63.5 mm(2)
    Back-End Diameter MinaBack-End Diameter Max
    Back-End Diameter
    Back-End Diameter
    • 0.75 in(3)
    • 1.0 in(6)
    • 1.25 in(3)
    • 1.5 in(3)
    • 2.0 in(3)
    • 2.5 in(2)
    Back-End Diameter MinaBack-End Diameter Max
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